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04-29-2012, 07:44 PM | #1 |
C'est la vie
Drives: 2009 2 door hatchback Join Date: Aug 2009
Location: chicago
Posts: 482
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Limits of stock 1nzfe found once and for all.
This is my motor with bent rod and cracked block and piston sleeve. This was at 12psi and 197whp dynoed only 2 days before major engine noise on a mustang dyno. Now on to the build of my junk jard motor.
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04-29-2012, 08:19 PM | #2 | |
USAF_SrA_E-4
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Ouch
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04-29-2012, 10:58 PM | #3 |
Drives: 2008 Black Sedan Join Date: Oct 2008
Location: FL
Posts: 966
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Told ya the rods where the first to go lol. Thanks to for getting that Dyno. Be sure to add your info to my durability thread when u get a chance. You pushed it further than i did by 2 psi. At 10psi after awhile I burnt up my valves. How are yours?
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04-30-2012, 08:56 PM | #4 |
C'est la vie
Drives: 2009 2 door hatchback Join Date: Aug 2009
Location: chicago
Posts: 482
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Valves and rings were in good condition. I kept it running rich and cool. About 13:1 for cruzing and 11.5:1 for wide open throttle. If it runs to lean U burn valves and rings. My compression was 155 to 160psi on all except the one with the bent rod.
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04-30-2012, 01:55 AM | #5 |
Drives: 08 Yaris Turbo; 06 tC Turbo Join Date: Jan 2010
Location: New Jersey
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Wow. I'll keep the innuendos to myself.
Looking forward to watching your rebuild. Thanks again - this is a vital piece of information for those of us with boost. |
04-30-2012, 02:17 AM | #6 |
vroom vroom
Drives: lil red 5-door Join Date: Sep 2006
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hmmm Gonzo rods :D Sorry to hear that dude, but now we have a better idea of the limitations of the stock hardware :)
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04-30-2012, 07:14 AM | #7 |
Mr. 155 and climbing
Drives: Seriously Modded 07 Sedan Join Date: Jun 2006
Location: In The Hotbox
Posts: 4,742
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It has become obvious that 8psi is the max safe boost level with considerations of even staying at 6 for those folks that are looking for longevity and reliability. Personally in hindsight with my build I wouldn't tell anyone to use an internal wastegate unless they installed a premium turbo. I would also sttrongly recommend performing a compression test before and then again after installation.
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04-30-2012, 07:17 AM | #8 |
Mr. 155 and climbing
Drives: Seriously Modded 07 Sedan Join Date: Jun 2006
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I wish that I could reinforce your results, but since I had spiked to over 25psi the couple times my situation isn't a good marker. I will enjoy tearing my motor down especially since my rods shattered.
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04-30-2012, 07:54 AM | #9 |
ULTIMATE
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Location: USA, CT
Posts: 13,460
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Did you post the dyno chart from your mustang run?
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04-30-2012, 09:19 PM | #10 |
C'est la vie
Drives: 2009 2 door hatchback Join Date: Aug 2009
Location: chicago
Posts: 482
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I did not post the Dyno chart from that run. They forgot to print it. My second run after the car warmed up was 193whp. And thats the one they printed. I can assure U it did 197whp. I did 183whp at 10psi and the print out is posted on my other thread on page 25.
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04-30-2012, 12:04 PM | #11 |
Drives: 2005 Toyota Echo Join Date: Sep 2010
Location: Hamilton, Canada
Posts: 259
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I'm still wondering if there is a difference in the bottom end of the echo/xb compared to the yaris. Blownxa said he went through a few engines just above 150whp in his xa (with a good/safe tune) as well as a couple other xb guys on clubxb.com
Sorry to hear about your engine pimp. How much boost will you be running once it is built?
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04-30-2012, 12:38 PM | #12 |
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^ They seem identical to me. I've reviewed them side by side. Don't know about part numbers.
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04-30-2012, 12:59 PM | #13 |
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Looking at the EPC, the Echo, xA, xB, and Yaris all share the same part numbers for pistons, rods, and crankshaft. The Prius uses the same rods, but different pistons and crankshaft.
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04-30-2012, 12:47 PM | #14 |
Form>Function
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thats some high boost for these little guys. Now to the build. Good Luck!
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04-30-2012, 01:32 PM | #15 |
Mr. 155 and climbing
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The rods are useless unfortunately. I totally underatand why they are what they are, but it still is a fact.
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04-30-2012, 01:40 PM | #16 | |
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Quote:
If we could find out the compression PSI limit of the stock rods, it would be easy enough to run the math to determine the theoretical boost limit.
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04-30-2012, 01:50 PM | #17 |
vroom vroom
Drives: lil red 5-door Join Date: Sep 2006
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Crashy would cowering in fear if she could read that post :D
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04-30-2012, 07:38 PM | #18 |
Drives: Scion xA Join Date: Oct 2009
Location: Virginia
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I wouldn't tag a certain amount of boost to the limitation of stock rods.... It is power. Most likely the onset of power (torque) is the best measurement of limitation.
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